An Horry County woman, who is challenging a murder charge by saying she was protecting herself when she shot and killed her husband inside their home, spent most of Tuesday testifying about their relationship and details of the shooting.

Heather Sims, 33, of Conway, was the fourth witness to take the stand in her Stand Your Ground hearing in the Aug. 11, 2013, shooting death of her 35-year-old husband, David Sims Jr.

Heather Sims is charged with his murder.

Circuit Court Judge Cordell Maddox is presiding over the hearing on the state’s Stand Your Ground law, which allows for the use of deadly force against an intruder or attacker in a person’s home, business or vehicle.